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+ | Sometimes you modify a file, for example from the <tt>/etc</tt> directory, then when you try to save the file, you get a permission-denied error. This tip presents some suggestions for using sudo from with Vim, so you can successfullly write the file with temporary privileges. |
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− | I just wrote a little function that uses sudo and cp to save a file whose modes wouldn't allow me to write it. |
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− | + | Of course, this tip has to be used with caution, as it gets you more power. |
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+ | ==Suggestion 1== |
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− | TODO: |
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+ | If you find you do not have permission to perform <tt>:w</tt>, use the following: |
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− | *Another thing that would be nice, would be to integrate it to the interface, to get it work when :w is not enough, or at least having an alias like :wforce, :w!! or :whatever. |
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+ | You can make a command so <tt>:W</tt> invokes sudo: |
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+ | command W w !sudo tee % > /dev/null |
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+ | Or, if you know about the problem before starting Vim: |
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+ | sudo vim path_to_file |
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+ | ==Suggestion 2== |
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+ | The following function saves the current file to a temporary file, then copies the new file to replace the original. It preserves the modes of the original file, though it is being rewriten. |
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<pre> |
<pre> |
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function Suedit() |
function Suedit() |
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</pre> |
</pre> |
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− | Just use: |
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+ | ==Suggestion 3== |
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+ | Here is a mapping to save to a <tt>/tmp</tt> file, then overwrite the working file. |
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<pre> |
<pre> |
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+ | nnoremap <leader>es :w! /tmp/sudoSave \| let $fileToSave=expand('%') \| let $fileToSaveBackup=expand('%').'~' \| !sudo cp $fileToSave $fileToSaveBackup && sudo cp /tmp/sudoSave $fileToSave<CR><ESC>:e!<CR> |
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− | system('stat -c%a '.expand("%")) |
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− | instead of |
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− | system('find . -maxdepth 1 -name '.expand("%").' -printf "%m"') |
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</pre> |
</pre> |
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+ | '''Warning''' This command will reload the file; you will lose the modifications history (undo will not work, although it does keep a backup). |
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− | ---- |
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+ | Note that a backup is made, even when '<tt>nobackup</tt>' is set. |
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− | ---- |
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− | It's very simple: |
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− | :w !sudo tee % |
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− | |||
− | ---- |
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− | Minor improvement to prevent tee's stdout from "cluttering" your vim session: |
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− | But why not just: |
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− | sudo vi <file_whose_modes_wouldn't_allow_me_to_write_it> |
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Revision as of 08:18, 6 April 2009
created August 18, 2005 · complexity basic · author Bernard Pratz · version 6.0
Sometimes you modify a file, for example from the /etc directory, then when you try to save the file, you get a permission-denied error. This tip presents some suggestions for using sudo from with Vim, so you can successfullly write the file with temporary privileges.
Of course, this tip has to be used with caution, as it gets you more power.
Suggestion 1
If you find you do not have permission to perform :w, use the following:
:w !sudo tee % > /dev/null
You can make a command so :W invokes sudo:
command W w !sudo tee % > /dev/null
Or, if you know about the problem before starting Vim:
sudo vim path_to_file
Suggestion 2
The following function saves the current file to a temporary file, then copies the new file to replace the original. It preserves the modes of the original file, though it is being rewriten.
function Suedit() let fname=tempname() exe 'w '.fname let owner=system('stat -c%U:%G '.expand("%")) let modes=system('stat -c%a '.expand("%")) exec '!sudo cp '.fname.' '.expand("%") exec '!sudo chmod '.modes." ".expand("%") exec '!sudo chown '.owner'" ".expand("%") endfunction
Warning There is no check for symlinks. A symlink would be removed and replaced by a file with the symlink's modes, which are 777.
Suggestion 3
Here is a mapping to save to a /tmp file, then overwrite the working file.
nnoremap <leader>es :w! /tmp/sudoSave \| let $fileToSave=expand('%') \| let $fileToSaveBackup=expand('%').'~' \| !sudo cp $fileToSave $fileToSaveBackup && sudo cp /tmp/sudoSave $fileToSave<CR><ESC>:e!<CR>
Warning This command will reload the file; you will lose the modifications history (undo will not work, although it does keep a backup).
Note that a backup is made, even when 'nobackup' is set.
Comments
Use script#729 which has had more testing.